XL=2πfL defines which electrical property?

XL=2πfL defines which electrical property?

• A. Capacitive Reactance
• B. Inductive Reactance
• C. Resistance
• D. Impedance

Answer: (B)

Inductive reactance is the opposition to AC current produced by an inductor, and it varies with frequency as X_L = 2πfL. Here f is the AC frequency and L is the inductance, so the magnitude of the inductor’s impedance is X_L (often written as Z = jX_L for an ideal inductor). This means higher frequencies face greater opposition because the magnetic flux through the inductor changes more rapidly. Capacitive reactance would follow X_C = 1/(2πfC), which is a different relationship, and resistance is a real, frequency-independent opposition. Impedance is the total opposition combining resistance and reactance, not just the inductive part.

Inductive reactance is the opposition to AC current produced by an inductor, and it varies with frequency as X_L = 2πfL. Here f is the AC frequency and L is the inductance, so the magnitude of the inductor’s impedance is X_L (often written as Z = jX_L for an ideal inductor). This means higher frequencies face greater opposition because the magnetic flux through the inductor changes more rapidly.

Capacitive reactance would follow X_C = 1/(2πfC), which is a different relationship, and resistance is a real, frequency-independent opposition. Impedance is the total opposition combining resistance and reactance, not just the inductive part.